RiverFish

Grayling · Thymallus thymallus

Grayling in the Summerlock Stream

Largest measured grayling: 24.6 cm

The largest grayling measured in Environment Agency surveys of the Summerlock Stream was 24.6 cm, recorded at Summerlock at Maltings Car Park on 31 August 2017.

Across 41 measured grayling, the median measured length was 16.7 cm.

RiverFish uses Environment Agency survey measurements rather than rod-and-line angling records. These figures show fish measured during EA surveys of the Summerlock Stream.

See grayling records across England →

Most recent observation10 September 2024Summerlock Downstream Ashley Road · 1 fish
Largest measured grayling
24.6 cm
Median length
16.7 cm
Fish measured
41
Survey locations
2

Individual EA measurements

Largest measured grayling

The largest individual measurements in this river and species dataset. Equal measurements are retained as separate surveyed fish.

LengthSurvey dateSurvey locationSurvey ID
24.6 cm31 Aug 2017Summerlock at Maltings Car Park151417
24 cm3 Sept 2015Summerlock at Maltings Car Park146441
23.9 cm3 Sept 2015Summerlock at Maltings Car Park146441
23.5 cm14 Oct 2021Summerlock Downstream Ashley Road160728
21.5 cm31 Aug 2017Summerlock at Maltings Car Park151417
21 cm3 Sept 2013Summerlock at Maltings Car Park138804
20.4 cm14 Oct 2021Summerlock Downstream Ashley Road160728
20.4 cm3 Sept 2013Summerlock at Maltings Car Park138804
20.3 cm10 Sept 2024Summerlock Downstream Ashley Road167010
20.3 cm31 Aug 2007Summerlock at Maltings Car Park106894

Lengths are direct survey measurements. RiverFish does not estimate fish weights from length.

Explore the river

Where grayling were found

Each point marks a survey location with at least one grayling record.

Choose a point on the map to see what was recorded there.

Map points are approximate and don’t show fishing access. Check local permissions before visiting.

Place surveyedFirst recordedLast recordedVisits finding grayling
Summerlock Downstream Ashley Road14 Oct 202110 Sept 20242
Summerlock at Maltings Car Park7 Sept 200128 Sept 20229

Choose a point or table row to see the location. More survey visits can mean more records, but not necessarily more fish.

2001–2024

Survey records by year

Each bar shows how many survey visits recorded grayling that year.

Fish measured by surveyors

Measured length distribution

See how the 41 measured fish were spread across different length ranges.

Smallest
8.3 cm
Lower quarter
9.8 cm
Median
16.7 cm
Upper quarter
20 cm
Largest
24.6 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Summerlock Stream

Compare other species with enough survey and measurement data for a detailed page.

Brown / sea trout Bullhead Minnow Atlantic salmon Stone loach Chub

Before you fish

Good to know

These are past survey records, so the fish present today may be different. Map points are approximate—check local access, permissions and fishing rules before visiting.

Learn how RiverFish uses the data →